Hold-back for cylindrical lock



June 17, 1958 Filed Nov. 18, 1954 5 Sheets-Sheet 1 ATTORNEY June 17, 1958 R. w. scHMlD HOLD-BACK Foa CYLINDRICAL Locx 3 Sheets-Sheet 2 Filed' Nov. 18, 1954 INVENTOR. 23mm/ MJC my ATTORNEY June 17., 1958 y R, wi SCHMID 2,838,926

HOLD-BACK FOR CYLINDRICAL LOCK 3 Sheets-Sheet 3 Filed Nov. 18, 1954 INVENTOR.

MK2/QW ATTORNEY United States Patent f HOLD-BACK FOR CYLINDRICAL LOCK Raymond W. Schmid, Havertown, Pa., assignor to The Yale & Towne Manufacturing Company, Stamford,

Conn., a corporation of Connecticut Application November18, 1954, Serial No. 469,669

4 Claims. (Cl. 70-216) This invention relates to tubular'locks, and more particularly to means for controlling the positioning of the latchbolt of a tubular lock. j Y

In locks of that class to which my invention relates, inside and outside knobs are mounted on opposed'spindles or sleeves that rotate on bearing plates in a lock case. Each spindle or sleeve has a cam portion acting against a bolt retractor to retract the latchbolt. Spring means press the bolt retractor and the spindles or sleeves together with the latchbolt to a position corresponding to the thrown position of the latchbolt.

VIt is usual to equip locks of this class with locking means for the outside knob. These locking means are elective to lock the outside knob with its spindle or sleeve when the sleeve is in a position corresponding to the thrown position of the latchbolt. Means for controlling the locking'means are mounted on one or both knobs, the

outside knob having usually a lock cylinder that permits the door to be opened from the outside through the use of a key.

As a feature of my invention, I utilize a locking member for both locking the outside knob against retracting the latchbolt, and also for holding the latchbolt in a retracted position. As a further feature, I prefer to utilize a lock cylinder mounted in the outer knob for locking or releasing the outside spindle or sleeve for rotation, the lock cylinder being eiective also to move the locking member to lock the spindle or sleeve in a position holding the retractor'in a position corresponding to full retraction of the latchbolt.

I have thus outlined rather broadly the more important features of my invention in order that the detailed description thereof that follows may be better understood, and in order that my contribution to the art may be better appreciated. There are, of course, additional features of my invention that will be described hereinafter and which will form the subject of the claims appended hereto. Those skilled in the art will appreciate that the conception on which my disclosure is based may readily be utilized as a basis for the designing of other structures for carrying out the several purposes of my invention. It is important, therefore, that the claims be regarded as including such equivalent constructions as do not depart from the spirit and scope` of my invention, in order to prevent the appropriation of my invention by those skilled in the art.

. y.Referring now to the drawings:

Fig. 1 is a longitudinal section showing my invention in a tubular lock.

Fig. 2 isa cross section on the line 2 2 of Fig. l, with the latchbolt projected and the knob free to retract the latchbolt.

Fig. 3 shows the knob and its spindle or sleeve locked to hold the latchbolt retracted.

Fig. 4 is similar to Fig. 2, but with parts omitted to show the invention more clearly.

Fig. 5 shows the spindle sleeve locked in position corresponding to the thrown position of the latchbolt.

Fig. 6 is a longitudinal section on the line 6 6 of Fig. 4.

Fig. 7 shows parts of my invention in exploded relation.

For thepurpose of describing my invention, I have chosen to illustrate a tubular lock of the type that is shown in the application of Daniel Biblin, Serial No. 314,704, tiled October 14, 1952, now Patent No. 2,751,243. The particular lock includes a lock case 10, well shown in Fig. l, in which an inside spindle or sleeve 11 and an outside spindle or sleeve 12 are mounted to rotate, with knobs 13 and 14 on the ends of these sleeves. Roses 15, 16 are attached to the lock case 10 at opposed sides of the door, but the particular construction of these roses and the manner in which they are secured is not important to an understanding of my invention.

The lock case 10 is constructed with bearing plates 17, 18 having openings in which the inner ends of the sleeves 11, 12 rotate, with lugs 12a, 12b, on the sleeves, Figs. 6 and 7, preventing axial movement of the sleeves in the plates. A bolt retractor 19 slides in the lock case 1@ between the bearing plates 17, 13 and is formed with transverse anges 2t) for coaction with the inner end of 24, Figs. 2 and 3, that interlock with a tailpiece 25 on a latchbolt 26. Those skilled in the art will understand that through this arrangement, either sleeve 11, 12 when rotating acts through its cam 22, 23 to slide retractor 19 in the case 10 whereby to retract latchbolt 26. j Springs 27 are engaged between the rear of lock case 10 and a part of retractor 19 to press the retractor toward a position corresponding to the thrown position of the latchbolt. The latchbolt 26 has a further spring 26a that presses it toward thrown position. These several springs act yieldingly through retractor 19 upon cams 22, 23 to hold sleeves 11, 12 and their knobs 13, 14 in a release position.`

It will be realized that the lock structure as I have thus far described it is rather conventional, and I refer to thisy structure merely to facilitate an understanding of the invention. It is important to know principally that tte4J inside and outside sleeves 11 and 12 rotate in correspond. ing bearing plates 17, 18 in a lock case and thereby mow a bolt retractor 19 in the case, with springs pressing the retractor normally to position corresponding to the thrown position of the latchbolt.

The extremely novel hold-back that I have now conceived utilizes a locking' member 28 that is mounted within the inner end portion of the outside spindle sleeve 12 in aligned relation to the corresponding bearing plate 18. As is well shown in Figs. 4, 5, 6, and 7, this locking member 28 is slotted whereby to be approximately C- shapedin form, and somewhat smaller than the inside of spindle sleeve 12, with a radially projecting detent 29 formed integrally on the member at one side. This detent 29 is positioned-always in a slot 30 in the outside sleeve l2 so that it holds the locking member 28 for rotation with the sleeve at all times. Because of its construction, the locking member 28 can move radially in sleeve 12 between its position of Fig. 4 and its position of Fig. 5 to project and retract its detent 29 relatively to slot 30 and a` notch 33. Preferably locking member 28 is formed with opposed surfaces 31, 32 that are each curved to conform to the inner surface of sleeve 12, whereby the locking member 28 can seat against this sleeve in either position of detent 29 relatively to slot 3i). I shall describe in due course the particular means that I utilize for moving the locking member 2S.

I form in the bearing surface of bearing plate 18 a notch 33 with which the slot 30 in outside sleeve 12 is aligned, as in Figs. 4 and 5, when the sleeve is in a release position, or in other words, when the sleeve 12 is in position corresponding to the thrown position of the latchbolt. Thus, through a movement of the locking member 2S when the latchbolt 26 is in thrown position, detent 29 will enter notch 33, as in Fig. 5, and will thereby lock outside spindle sleeve 12 against rotation so that the door cannot be opened through rotation of the outside knob 14.

At a point that is angularly separated from the notch 33, I form the bearing surface of plate 18 with a notch 34. This notch 34 has an end surface 35 that is aligned with one side of slot 39 in spindle sleeve 12, as in Fig. 3, when the sleeve is rotated to retract the latchbolt. With `the spindle sleeve 12 in this position, the locking member 28 can be moved to project its detent 29 against surface 35 on the bearing plate 1S as illustrated in Fig. 3. The outside sleeve 12 cannot now rotate clockwise and the cam 23 on sleeve 12 therefore holds the retractor 19 and bolt 26 in a retracted position. When retracting the latchbolt 26, the sleeve 12 may, of course, rotate in either direction `from its release position of `rFig. 2, and to enable the locking member 28 to serve as a holdback in either rotated position of the sleeve 12, I prefer to form bearing plate 18 with a second hold-*back notch 36 in opposed relation to the notch 34.

I shall now describe particularly the noted means whereby I actuate the locking member 2S. Within the outside sleeve 12, in juxtaposed relation to the locking member 2S, I mount an operator 37 that is best seen in Figs. 6 and 7. This operator 37 is adapted to rotate within sleeve 12, and has preferably a spool-like shape, with end flanges 3S and 39 that engage the inner surface of the sleeve 12. I form a flanged stud 40 eccentrically on the inner end of operator 37, this stud extending into the slot of C-shaped locking member 28. Around its slot, locking member 28 has a shoulder 41 behind which the ange on stud 40 is engaged to assemble member 28 to operator 37. Because of the eccentric position of stud 40, operator 37 when rotating moves locking member 28 in a radial direction in spindle sleeve 12 to project and retract detent 29 relatively to the sleeve. I prefer to form the sleeve 12 with an inner projection 42, Fig. l, that is adapted to coact with ilange 39 on operator 37 so that the operator 37 and locking member 28 do not shift in an axial direction toward the bolt retractor 19.

I utilize a key actuated lock cylinder 43 on the outside knob 14, Fig. l, for rotating the operator 37. This ,lock cylinder 43 has a connecting bar 44 that extends into a central opening in operator 37, and that is adapted to coact with a lug 45 in this opening. Through this arrangement, a key 46 in lock cylinder 43 can rotate the operator 37 when the spindle sleeve 12 is either in position corresponding to the thrown position of the latchbolt, or in position corresponding to the retracted position of the latchbolt. It is thereby possible to actuate locking member 28 for locking the outside knob 14 when the latchbolt 26 is in thrown position, and it is possible moreover to actuate locking member 28 as a hold-back when latchbolt 26 is retracted.

I believe that those skilled in the art will now understand that I have contributed extremely novel hold-back means for the latchbolt of a tubular lock. Through my novel concept, I am able to utilize for holding the latchbolt in retracted position the same locking member that locks the outside knob in locking position. I can actuate this locking member to both hold-back and locking positions through a lock cylinder in lthe outside knob, and I accomplish this moreover, through the use of extremely simple structures. I believe, therefore, that the very considerable value of my invention will be fully appreciated.

I now claim.

1. In a lock of the class described, a lock housing, a latchbolt retractor sliding on said lock housing between a position corresponding to the throw position of the latchbolt and latchbolt retracting position, a sleeve rotatable on said housing `to move the retractor to retracting position, a locking member for said sleeve mounted on said sleeve for movement relatively to said sleeve, and means through which said locking member when moved relatively to said sleeve coacts with the housing for locking said sleeve against rotation in a position corresponding to the thrown position of said latchbolt retractor and in a position corresponding to the latchbolt retracting position of said retractor.

2. In a lock of the class described, a lock housing, a latchbolt retractor in said housing, a sleeve rotatable on said housing to move said retractor to latchbolt retracting position, a locking member rotating with said sleeve, means for moving said locking member relatively to said sleeve when the sleeve is in position lcorresponding to the throw position of the latchbolt and in position corresponding to the retracted position of the latchbolt, and a lug on said locking member coacting with a part of said housing when the locking member moves relatively to the sleeve whereby to lock the sleeve in each of said positions.

3. In a lock of the class described, a lock housing, a latchbolt retractor in said housing, a sleeve rotatable on said housing to move said retractor to latchbolt retracting position, a locking member mounted on said sleeve to rotate with said sleeve, a lug on said locking member, surfaces on said lock housing with which said lug is aligned when the sleeve is in a position corresponding to the thrown position of said latchbolt retractor and in a position corresponding to the latchbolt retracting position of said retractor, and means for moving the locking member in each of the said positions of the sleeve whereby said lug coacts with said surfaces to lock the sleeve in either position.

4. In a lock of the class described, a lock housing having a bearing plate, a latchbolt retractor sliding relatively to said bearing plate, a sleeve rotatable in an opening of said bearing plate and having portions adapted to move said retractor to latchbolt retracting position when said sleeve rotates from a locking position to a release position, a locking piece mounted for movement relatively to said bearing plate, surfaces on said sleeve and bearing plate that are aligned through rotation of the sleeve to each of its said positions, a lug on said locking piece for coacting with said surfaces, and means for moving said locking piece when the sleeve is in a position corresponding to the throw position of said latchbolt retractor and in a position corresponding to the latchbolt retracting position of said retractor whereby said lug coacts with said surfaces to lock the sleeve in either position relatively to the lock housing.

References Cited in the le of this patent UNITED STATES PATENTS 1,545,712 Toy July 14, 1925 1,583,890 Love May 11, 1926 1,896,907 Lindsay Feb. 7, 1933 2,226,499 Ledin Dec. 24, 1940 2,694,919 Fisler et a1. Nov. 23, 1954 

